private void OnDragInitialize(object sender, DragInitializeEventArgs e)
{
var draggedItem = (sender as ListBox).SelectedItem as MyObject;
e.AllowedEffects = DragDropEffects.All;
var data = DragDropPayloadManager.GeneratePayload(null);
string text = typeof(MyObject).ToString();
if (draggedItem != null)
{
text = draggedItem.Name;
}
data.SetData("Text", text);
data.SetData("DraggedData", draggedItem);
e.DragVisual = new DragVisual()
{
Content = text,
};
e.DragVisualOffset = e.RelativeStartPoint;
e.Data = data;
shouldCancelDrop = false;
}
private void OnTimelineDragInitialize(object sender, DragInitializeEventArgs e)
{
var itemControl = e.OriginalSource as TimelineItemControlBase;
if (itemControl != null)
{
var data = (TimelineDataItem)itemControl.DataContext;
var dataItem = (ITimelineItem)data.DataItem;
var payload = DragDropPayloadManager.GeneratePayload(null);
payload.SetData("DraggedItem", dataItem);
e.AllowedEffects = DragDropEffects.Move;
e.Data = payload;
this.dragVisual.Content = new TimelineItemDragVisualInfo()
{
ItemImageSource = new RadBitmap(itemControl).Bitmap,
ItemImageWidth = itemControl.ActualWidth,
ItemImageHeight = itemControl.ActualHeight,
};
e.DragVisual = this.dragVisual;
this.groupControlInfos = GetGroupInfos(timeline);
}
}
private static void DragStart(UIElement source)
{
_isDragging = true;
FrameworkElement sourceElement = _dragSource.SourceElement;
sourceElement.PreviewDragEnter += _dragSource.PreviewDragEnterHandler;
sourceElement.PreviewDragOver += _dragSource.PreviewDragOverHandler;
sourceElement.PreviewDragLeave += _dragSource.PreviewDragLeaveHandler;
DragInitializeEventArgs args = new DragInitializeEventArgs
{
DragStartPosition = DragStartPosition
};
OnDragInitialize(source, args);
if (args.Data != null)
{
DragDropEffects effects = System.Windows.DragDrop.DoDragDrop(source, args.Data, DragDropEffects.All);
DropCompletedEventArgs dropCompletedArgs = new DropCompletedEventArgs(DragDrop.DropCompletedEvent, effects, args.Data);
OnDropCompleted(source, dropCompletedArgs);
}
sourceElement.PreviewDragEnter -= _dragSource.PreviewDragEnterHandler;
sourceElement.PreviewDragOver -= _dragSource.PreviewDragOverHandler;
sourceElement.PreviewDragLeave -= _dragSource.PreviewDragLeaveHandler;
FinalizeDrag();
}
private void OnDragInitialize(object sender, DragInitializeEventArgs e)
{
this.draggedImage = e.OriginalSource as Image ?? (e.OriginalSource as FrameworkElement).ParentOfType <Image>();
if (this.draggedImage == null)
{
e.Cancel = true;
}
this.relativeStartPoint = e.RelativeStartPoint;
}
private void OnDragInitialize(object sender, DragInitializeEventArgs e)
{
Control source = sender as Control;
Panel context = DragManager.DragContext;
Point dragStart = DragManager.DragStartPosition;
e.Effects = DragDropEffects.All;
Point mousePos = e.GetPosition(context);
Point itemPos = source.TranslatePoint(new Point(), source);
Point offset = new Point(mousePos.X - itemPos.X, mousePos.Y - itemPos.Y);
e.DragVisualSize = new Size(source.ActualWidth, source.ActualHeight);
e.DragVisualOffset = offset;
e.Data = DragDataManager.GenerateDataObject(source);
}
private static void OnDragInitialize(UIElement element, DragInitializeEventArgs e)
{
_dragSource.DragInitializeHandler?.Invoke(element, e);
}
